snediker



Feb. 19, 1924.l 1,484,092-

M.V O. SNEDIKER GRADUATED MOVEMENT REGULATOR I Q 5421i l C I l l 30 l lM 1 1| z a l V422 QZ l M` 0 In T f 55 37 I g/ l* 2 Feb. 19 1924.,1,484,092

y M. asm-:BIKER y GRADUATED MOVEMNT REGULATOR FiledJan. '7, 1922 2Sheets-Sheet 2 Paamd Feb. 19', 1924.

, UNITED STATES @PATENT orifice.

MORTON O. SNEDIKER, OF CHICAGO, ILLINOIS, ASSIGNORVTO THE POWERSREGULATOR COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION F ILLINOIS.

GRADUATE-MOVEMENT REGULATOR.

Application lged January 7, 1922. LSerial No. 527,617.

To all 'whom it 'may concern:

Beit known that I, Mon'roN OnSNEDIKER, a citizen of the United States,and resident of Chicago, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in a Graduated-Movement Regulator, of which the following is a specification.

My invention relates to regulators and particularly to a novelmechanical apparatus adapted to effect the graduated control of dempersor valves through the medium of an auxiliary Iforce such as compressedair.

One of the objects of my invention is to provide improved apparatus sodesigned as to effect the desired control in a more satisfactorymanner.4 To that end I provide in the regulating apparatus an aircontrol diaphragm or bellows, the expansion of which is opposed to theexpansion of the thermostatic element, the resultant or differential ofthe two forces acting upon a valve which controls the supply ofcompressed air effective to regulate the position of the valve for theheat supplying medium. In addition I provide a constantly-open relief orescape valve located in the passage between the compressed air valveandthefheat control valve.

By means of the mechanisme here disclosed, I am able to maintain adesired temperature lwithin narrower limits of variation than hasheretofore been ossible and in addition the mechanism 'is more sturdyand contains no delicate parts nor minute andsensitive valves.

One of the important steps in advance, leadin toward more accuratecontrol, is that ofthe provision of the air bellows the interior ofwhich is in communication with the air on the outlet side of the controlvalve. In devices of similar construction heretofore proposed thebellows has been in communication `with the air on the inlet side; inother words, in constant commun icationl with the 4maximum pressure ofthe air.

The invention will be more readily understood by reference to theaccompanying drawings, wherein, v

Fig. 1 is a face view with the cover removed, of a regulating apparatusconstructed in accor ance with my invention;

Fig. 2 is a sectional view on the line 2-'2 of Fig. 1, and, l

Fig. 3 is a sectional view, somewhat diagrammatic in character, ,bymeans of which the passage of the regulating iuid such as compressedair, may readlly be traced.

Referring to the drawings it will be seen that I have provided a frameor casing 10, to which a cover 11 is adapted to be secured. The casingprovides for an inlet connection 12, and an outlet connection 13,

for compressed air, which is preferably.

maintained at a substantially constant pressure of fifteen pounds persquare inch. yThe supply of compressed air Iis 'conducted through apassage 14, to a valve 15, normally held against its seat by .a spring16, vthe space within which the spring 1s seated being covered by ascrew-cap 17.' A second passage 18 conducts towards the outlet thecompressed air which escapes past the valve 15. Located vat a suitablepoint in 'the passage 18, is .a constantly open escape valve 19, whichis adjusted in order to provide a waste opening of the required size.Located in the two passages 14, 18, are branch passages to the outletsto which auges 20, 21, respectively are connected.

hese serve to indicate the inlet andeutlet pressures yof the fiuid.

Located ,beneath the valve 15, is a plunger 22, Ythe upper end of whichcontacts a concentric projection 23 from the valve 15, theplunger beingloosely mounted in the opening in which it is positioned. The plungerisseated within the two walls of a bellows 24, and therefore the interiorof the bellows is in communication with the fluid on the outlet side ofthe air valve 15. One lwall of the bellows is firmly secured to athreaded plu-g 25, which is seated within the portion of the casingwhich carries the valve 15. The `other wall of the bel'lows is adaptedto bear against a block 26, which is secured ito the relatively movablewall 27 of a second bellows. The opposite wall 28 of the second" bellowsis an chored in a threaded block 29 which .is held against rotation bymeans of a projection 30, engaging with a lug 31, forming a part of theframe. The space between the walls 27, 28, of the second bellows is incommunication by means of a iexible tube 32,

p with a rigid tube 33, adapted to contain a f lar opening in a part 35of the frame, a

flange 36 on the sleeve serving to limit the upward movement thereof. Astiff flat spring 37, which engages the lower eX- tremity of the sleevemaintains the same in its proper position, and provildes against damageto the bellows as the result of the development of pressure above thatcontemplated for normal operation. A ring 38, carrying a flanged disk39, is fixedly secured to the lower portion of the sleeve 34 by means ofa set-screw 40. On the vertical face 41, of the flange of the disk Iprovide suitable graduations 42. A square projection 43, from the lowerend of the sleeve extends lthrough a central opening in the fiat spring37 and is presented opposite a relatively larger opening 44, in'thecover 11. A suitable tool extending through the opening 44 and engagingthe 'square projection may be employed for rotating the sleeve includingthe graduated disk, the face of which is visible through the glasscovered sight opening 45, in order to adjust the de vice as required. Avertically positionedy screw 46 is so located as to .act as a limit stoppreventingcomplete rotation of the adjusting element.

In Fig. 3, which is ,as stated, somewhatV diagrammatic in character, thesection plane isy rotated in order to illustrate the ventv19. In thatview an alternate form of the second bellows 27, 28. is shown, twocapsules being employed instead of one, as shown in Figs. 1 and 2.

The operation is as follows;

Assuming that the outlet'13 is connected by suitable piping to a heatcontrol valve and that the valve is so arranged that it is normallymaintained in. open position by spring pressure, it will be seen thatair pressure must be provided in order to close the valve and excludethe heating`medium. Assuming also that the inlet is connected to asuitable supply of air under pressure and that the parts have previouslybeen adj usted as required, with the thermostatic element 33 so locatedas to communicate the4 temperature conditions in the usual manner, itwill be seen that an increase in the temperature will, through themedium of the thermostatic element tend to expand the bellows, comprisedby the walls 27, 28, and to open the valve 15. This will lserve to admita greater volume of air under pres insecte sure and this air so admitted,wi1l`immediately act through the medium of the first bellows 24, tooppose the opening movement j within the space to be controlled willserve l to permit the contraction of the thermostatic bellows and permitthe closing yof the inlet valve. Thereafter the waste of air through theopening 19 will relieve the pressure at the heat control valve andpermit the openingof the valve and the supply of additional heat.

The additional of the air pressure bellows in opposition to thethermostat and the pro-A vision of the constant waste opening results inthe production of a device in which the regulating action is not onlygraduated i but is extremely uniform in its actionand will maintain thetemperature more nearly constant than the devices heretofore pro--posed.

The det-ail including the thermostaticbulb connected to the operatingbellows by means of a flexible tube, while old in other forms ofthermostatic control devices, is new in a combination such as heredisclosed. It /aiapts the device to a number of uses not heretoforepossible and contributes to the general result: that of simplicty andrugged construction.

Obviously the construction is capable of much modification and I do notwish to be limited except as indicated in the appended claims.

I claim: l

1. In a regulating device, the combination of a easing providing aconduit for air under pressure, an air control valve dividing saidconduit into 4inlet and outlet passages, a bellows one wall of which isanchored to the casing, a plunger within said bellows and bearing at oneend upon the movable wall of said bellows, the other end of said plungerbeing adaptedto contact said valve, a second. bellows adapted to beconnected to a thermostatic element and, so located that its movablewall may contact the\ tive fluid, a valve interposed in said conduit,

a bellows the interior of which is in communication with the motivefluid after it passes said valve, the expansion of said bellows tendingto permit the seating of said valve, said conduit being provided with aconstantly open vent, a second bellows located adjacent to said firstbellows and adapted on expansion to unseat said valve against thepressure exerted by said first mentioned bellows, a distant thermostaticelement, a flexible tube connecting the in. terior of the same with .theinterior of said bellows, and means for bodily movingone wall of saidthermostatic bellows for the purpose of adjusting the action thereof.

3. In a regulat'. device, the combination of a member provi inga-conduit for a motive fluid, a valve interposed in said cona bellowsthe' interiorof which is in communication' with the motive 'fiuid afterit passes said valve, the expansion" of said bellows tending to permitthe seating of said lvalve, said conduit being provided with aconstantly open vent, a second bellows located adjacent to said first'Abellows and adapted-on; expansion to unseat said valve against thepressure exerted by said first mentioned bellows, afdistant thermostaticelement, a flexible tube connecting the interior of the same with theinterior of said duit,

'seating of said valve,

bellows, means for bodil of said thermostatic be action ofthe same,and'a norma y rigid sprin for maintaining the thermostatic bel- -lows 1noperative position and permitting abnormal expansion thereof.

moving one wall ows to ad'ustthe #4. In a graduated movement regulator,I

the combination of means roviding a passa for a motive flui a diaphragmadapted'to be acted Aupon bythe fluid, a sprmg-seated valve in saidpassage, the expansion of said diaphragm under the action of said fluidtending to permit the an open vent in said passage past said valve, athermostaticbel lows having relatively fixed and movable walls, saidmovable wall acting in opposition to said. diaphragm and connected saidvalve whereby to open the valve on expansion of said bellows, a distantri 'd thermostatic tube adapted to contain a vo a'- tile liquid, aterior of said thermostatic tube to said thermostatic bellows, and meansfor moving said relatively fixed wall of said thermostatic bellowswhereby to change the adjustment thereof. Y A

Signed at Chicago, Ill., this 30th day of December, 1921.

MORTON SNEDIKER.

flexible tube connecting the in-

